HCPCS Code J2704: Injection, Propofol, 10 mg

Yes. They need to fast for 8 hours before getting the injection. They also might need to stop taking certain medications, or at least adjust their dosages. This must be discussed with the patient, so please ask them about the medicines they take.

Almost immediately. And it'll last for as long as the infusion of the drug continues.

Yes. They will likely feel pain and discomfort in the injection site once everything is done (including whatever procedure they were undergoing). Other common side effects include respiratory depression and hypotension. The ones you really need to keep an eye out for are allergic reactions.